EDIFIER TWS330NB Hybrid ANC TWS Wireless Bluetooth Earphone bluetooth 5.0 quick charge AI Phone Call Noise Cancellation Hybrid active noise cancellation technology isolates you from unwanted noise Ambient sound mode allows you to hear environmental sounds such as traffic or flight announcements AI call noise cancellation technology ensures clarity of phone calls AAC audio decoding for high-definition audio with rich details 20 hours continuous playback with quick charging earbuds IP54-rated dust and water resistance for outdoor useBluetooth: 5.0 Protocol of Bluetooth: A2DP/AVRCP/HFP Audio Decoding Format: AAC?SBC Effective Distance: 10m Running Time: 4h+12h (with noise cancelling on);5h+15h (with noise cancelling off) Charging Time: 1h (earphones) + 1.5h (charging case) Input: 5v==200mA(earbuds); 5v=200mA(charging case) Frequency Range: 20Hz-20khZ Output SPL: 94±3dBspL(A) Rated Impedance: 24Ω